TY - JOUR
T1 - Low-temperature resistivity and susceptibility of the low-carrier density, one-dimensional S = 1/2 antiferromagnet Yb4As3
AU - Gegenwart, P.
AU - Cichorek, T.
AU - Custers, J.
AU - Lang, M.
AU - Aoki, H.
AU - Ochiai, A.
AU - Steglich, F.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2001
Y1 - 2001
N2 - We report on low-T (T ≥ 0.02K) measurements of the electrical resistivity, p(T, B), and the magnetic AC-susceptibility, Χac (T, B), on the low-carrier density, one-dimensional S = 1/2 antiferromagnet Yb 4As3 in magnetic fields B ≤ 19 T. For 2 K ≤ T ≤ 20K we find ρ - ρ0 = AT2 (ρ0: residual resistivity), with a large coefficient A ≈ 0.75 μΩcm/K 2 followed by a minimum around 1K and a 0.1 % increase for T → 0. In finite fields and below about 5 K, ρ(T, B) shows a historydependent hysteretic behavior. The oscillatory behavior superimposed is attributed to the Shubnikov-de Haas effect arising from a low density of mobile As-p holes. For T ≥ 0.4 K, Χac (T) follows the prediction of the quantum sine-Gordon model. A cusp-like anomaly is found at 0.15 K.
AB - We report on low-T (T ≥ 0.02K) measurements of the electrical resistivity, p(T, B), and the magnetic AC-susceptibility, Χac (T, B), on the low-carrier density, one-dimensional S = 1/2 antiferromagnet Yb 4As3 in magnetic fields B ≤ 19 T. For 2 K ≤ T ≤ 20K we find ρ - ρ0 = AT2 (ρ0: residual resistivity), with a large coefficient A ≈ 0.75 μΩcm/K 2 followed by a minimum around 1K and a 0.1 % increase for T → 0. In finite fields and below about 5 K, ρ(T, B) shows a historydependent hysteretic behavior. The oscillatory behavior superimposed is attributed to the Shubnikov-de Haas effect arising from a low density of mobile As-p holes. For T ≥ 0.4 K, Χac (T) follows the prediction of the quantum sine-Gordon model. A cusp-like anomaly is found at 0.15 K.
KW - Heisenberg chain
KW - Low-carrier density system
KW - Rare-earth pnictides
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U2 - 10.1016/S0304-8853(00)00620-X
DO - 10.1016/S0304-8853(00)00620-X
M3 - Article
AN - SCOPUS:33748692700
VL - 226-230
SP - 630
EP - 632
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - PART I
ER -